34 



On the RESISTANCE of the AIR 



ABSTRACT of Velocities and Actuating Weights. 



Here the firft column contains the velocity per fecond ; the 

 fecond column contains the experimented adluating weight, 

 with the flat fide foremofl ; the third column that for the round 

 fide foremofl ; and the fourth column that for the lead only : 

 Then the fifth column contains the difference between the fe- 

 cond and fourth, or actuating weights for the flat fide and lead; 

 and the fixth column the difference between the third and 

 fourth, or actuating weights, for the round fide and lead only ; 

 fo th?t the fifth and fixth columns, when divided by 51 f, will 

 be the true meafure of the refiftance of the air to each fide of 



the 



